Compilare: user.cpp: In function ‘long long int solve(Point)’: user.cpp:81:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ansl + step + 1 < up.size()) ^ user.cpp:87:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ansr + step + 1 < down.size()) ^ user.cpp: In function ‘int main()’: user.cpp:101:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("geometrie.in","r",stdin); ^ user.cpp:102:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("geometrie.out","w",stdout); ^ user.cpp:104:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &q); ^ user.cpp:105:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= n; i++) scanf("%lld%lld", &P[i].x, &P[i].y); ^ user.cpp:106:78: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= q; i++) scanf("%lld%lld", &Q[i].x, &Q[i].y), Q[i].id = i; ^